US6548990B2 - Automatic vehicle-mounted device control system - Google Patents

Automatic vehicle-mounted device control system Download PDF

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Publication number
US6548990B2
US6548990B2 US09/948,581 US94858101A US6548990B2 US 6548990 B2 US6548990 B2 US 6548990B2 US 94858101 A US94858101 A US 94858101A US 6548990 B2 US6548990 B2 US 6548990B2
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Prior art keywords
vehicle
control unit
power generator
electronic control
control
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Expired - Lifetime
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US09/948,581
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US20020036485A1 (en
Inventor
Tomoya Okuno
Koji Tanaka
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Denso Corp
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Denso Corp
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Priority claimed from JP2000296345A external-priority patent/JP4325100B2/ja
Priority claimed from JP2000357684A external-priority patent/JP4140191B2/ja
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Assigned to DENSO CORPORATION reassignment DENSO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OKUNO, TOMOYA, TANAKA, KOJI
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
    • H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
    • H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle

Definitions

  • the present invention relates to a vehicle-mounted device control system mounted in a passenger vehicle, a truck or the like, and particularly to a power generator control system which enables use of a single electronic control unit even when a power generator type is changed.
  • Electric power generated by a power generator (alternator) mounted in a vehicle is used to drive various electric loads and to charge a vehicle-mounted battery.
  • the output current characteristic and the torque characteristic of the power generator are determined in accordance with a vehicle type and vehicle-mounted electric loads. These characteristics differ by types of vehicles. Further, the characteristics differ for the same type of vehicle, when a maker of a power generator differs.
  • a vehicle-mounted control system comprises a vehicle-mounted device such as a power generator controllable in response to a control signal applied thereto, an electronic control unit for controlling the vehicle-mounted device by outputting the control signal, and a communicating line for transmitting the control signal from the electronic control unit to the vehicle-mounted device.
  • the electronic control unit automatically changes the control signal in response to a change in a type of the vehicle-mounted device.
  • FIG. 1 is a block diagram of a vehicle-mounted power generator control system according to a first embodiment of the invention
  • FIG. 2 is a characteristic diagram showing a rotation speed—output current characteristic of vehicular power generators
  • FIG. 3 is a characteristic diagram showing a rotational speed—load torque characteristic of vehicular power generators
  • FIG. 4 is a block diagram of a vehicle-mounted power generator control system according to a fifth embodiment of the invention.
  • FIG. 5 is a block diagram of a vehicle-mounted power generator control system according to a sixth embodiment of the invention.
  • a vehicular power generator device 1 comprises an alternator mounted in a vehicle.
  • a field winding 8 of the power generator device 1 is wound about a rotor (not illustrated), and is rotated in synchronism with rotation of an engine (E/G) 10 to thereby generate a rotating field.
  • Armature windings 7 wound around a stator core (not illustrated) opposed to the rotor with a gap generate alternating current power in accordance with a magnitude of the rotating field provided by the field winding 8 .
  • the power generator device 1 and the engine 10 are a first vehicle-mounted device and a second vehicle-mounted device in a vehicle, respectively.
  • the alternating current output is subjected to full-wave rectification by a three-phase full-wave rectifier circuit 9 and is supplied to a battery 2 via an output terminal B of the power generator device 1 .
  • the output of the three-phase full-wave rectifier circuit 9 is supplied from the output terminal B to an electric load 3 such as a lamp via a load switch 4 .
  • An electronic control unit (ECU) 5 transmits a target output voltage of the power generator device 1 , a control value (duty) of the field current of the field winding 8 and the like which are calculated by a power generator control signal output section 54 in the known manner, to a built-in voltage regulator 6 via a communication terminal C.
  • the regulator 6 controls the field current in accordance therewith.
  • the characteristics between the output current and the rotational speed of the power generator device 1 differ from generator to generator (Type 1 and Type 2 ).
  • the output of a power generator (Type 1 ) is large at a high rotation region, and the output of a power generator (Type 2 ) is large at a low rotation region.
  • the power generator (Type 2 ) is allowed to output its maximum power by 100% but the output of the power generator (Type 1 ) needs to be restricted to be equal to or less than a/b ⁇ 100%.
  • the electronic control unit 5 transmits a restricting value of current to the regulator 6 through a communication line 100 so that the regulator 6 carries out control operation based on received information. If information with regard to the output current characteristic of the power generator is transmitted from the regulator 6 to the electronic control unit 5 in advance, the electronic control unit 5 responsively changes control constants at inside thereof based on the received information. Thus, the electronic control unit 5 can transmit the current restricting value to the regulator 6 in accordance with the output current characteristic of the power generator device 1 . That is, by transmitting the information with regard to the output current characteristic of the power generator device 1 , the power generator device 1 having a different output characteristic can be controlled by a single electronic control unit 5 .
  • the electronic control unit 5 includes a control mode control section 50 and the regulator 6 includes a power generator identification signal transmitting section 60 .
  • the power generator identification signal transmitting section 60 transmits an identification signal indicating a type of the power generator device 1 via the communication line 100 to the control mode control section 50 .
  • the power generator identification signal transmitting section 60 comprises a microcomputer including a non-volatile electrically rewritable memory (EEPROM).
  • the microcomputer may inlcude a non-rewritable memory (PROM or ROM).
  • the memory of the power generator identification signal transmitting section 60 stores generator type identification information supplied from a write terminal (not illustrated) of the regulator 6 . Although it is preferable to write the information before mounting the regulator 6 in the power generator device 1 , the information can be written after mounting.
  • Generator type identification information may be written in a printed circuit board by changing a printed wiring pattern in place of the memory. Transmission of generator type identification information to the electronic control unit 5 may be carried out by time sharing along with other communication, can be carried out by the same line by using various multiplexing communication technologies, or may be carried out by using a plurality of serial lines.
  • the control mode control section 50 includes a non-volatile electrically rewritable memory (EEPROM) included in the electronic control unit 5 constructed with the microcomputer as a control mode storing section 53 .
  • EEPROM electrically rewritable memory
  • the electronic control unit 5 constructed with the microcomputer periodically executes predetermined programs.
  • the programs include a control mode selecting routine (control mode selecting section 52 ).
  • control mode selecting routine first, generator type identification information transmitted from the regulator 6 via the communication line 100 is read by a power generator identifying section 51 .
  • the control mode indicating the read type identification information is selected from the control mode storing section 53 and control information determined based on the selected control mode is transmitted to the regulator 6 .
  • the control mode storing section 53 may naturally be constructed with ROM or PROM in place of the EEPROM.
  • the electronic control unit 5 also includes an engine control signal output section 55 , which outputs engine control signals in the known manner.
  • the electronic control unit 5 is designed to control the power generator device 1 based on the load torque—rotational speed characteristic of the power generator device 1 shown in FIG. 3 .
  • FIG. 3 different load torque characteristics of two power generators are shown.
  • the regulator 6 transmits power generation duty to the electronic control unit 5 and the electronic control unit 5 calculates torque of the power generator device 1 by the engine control signal outputting section 54 based on the received power generation duty to thereby carry out an engine feedback control.
  • the power generation duty signifies on-off switching duty of a switching device (not illustrated) for switching the field current of the field winding 8 .
  • the torque characteristic of the power generator device 1 differs by a type of the power generator device 1 . Accordingly, if information with regard to the torque characteristic of the power generator device 1 is transmitted from the regulator 6 to the electronic control unit 5 in advance, the electronic control unit 5 changes control constants at inside thereof based on the received information. Thus, the electronic control unit 5 can calculate power generator load torque in accordance with the actual torque characteristic of the power generator device 1 . That is, by transmitting the information with regard to the torque characteristic of the power generator from the regulator 6 to the electronic control unit 5 , even a single electronic control unit 5 can deal with a plurality of types of the power generators 1 .
  • the power generator identification signal transmitting section 60 shown in FIG. 1 is omitted.
  • control mode control section 50 is provided with the non-volatile electrically rewritable memory (EEPROM) in the microcomputer as the control mode storing section 53 . Further, the control mode control section 50 is provided with the non-volatile electrically rewritable memory (EEPROM) as the selected information storing section.
  • EEPROM non-volatile electrically rewritable memory
  • the electronic control unit 5 constructed with the microcomputer periodically executes predetermined programs and executes the control mode selecting routine (control mode selecting section 52 ) in the programs.
  • control mode selecting routine first, the number of a control mode to be selected which is previously stored in the EEPROM is read as the selected information storing section. Then, based on the read number of the control mode, a plurality of control modes stored in the EEPROM (control mode storing section 53 ). The control information determined based on the read control mode is successively transmitted to the regulator 6 .
  • the number of the control mode to be selected may be written in the selected information storing section by connecting an external ROM writer to an input port of the electronic control unit 5 , or may simply be written by using an input apparatus provided to the electronic control unit 5 .
  • the control mode selecting information that which one of the plurality of control modes previously stored in the electronic control unit 5 is to be selected can be written in the electronic control unit 5 . Accordingly, the selected information may be written from outside of the electronic control unit 5 to the electronic control unit 5 . As a result, it is not necessary to transmit information for specifying the power generator device 1 from the regulator 6 and the construction of the regulator 5 can be simplified.
  • the power generator identification signal transmitting section 60 shown in FIG. 1 is omitted.
  • control mode control section 50 is provided with the non-volatile electrically rewritable memory (EEPROM) included in the electronic control unit 5 constructed with the microcomputer as the control mode storing section 53 .
  • EEPROM electrically rewritable memory
  • the electronic control unit 5 periodically executes predetermined programs. According to the programs, control information determined based on a control mode stored in the EEPROM as the control mode storing section 53 is transmitted to the regulator 6 .
  • the selected information storing section can naturally be constructed with ROM or PROM in place of the EEPROM.
  • the control mode may be written to the non-volatile electrically rewritable memory (EEPROM) of the electronic control unit 5 by connecting an external ROM writer to an input port of the electronic control unit 5 , or may simply be written thereto by using an input apparatus provided to the electronic control unit 5 .
  • EEPROM electrically rewritable memory
  • control modes are rewritably stored in the rewritable non-volatile memory provided in the electronic control unit 5 . Therefore, the stored control mode of the electronic control unit 5 may be rewritten in accordance with change of type of the power generator device 1 . As a result, it is not necessary to transmit information specifying the power generator device 1 from the regulator 6 and the construction of the regulator 6 can be simplified.
  • the electronic control unit 5 and the voltage regulator 6 of the power generator 6 are constructed differently from the first to fourth embodiments shown in FIGS. 1 through 3.
  • the regulator 6 includes a switching transistor 63 for controlling the field current supplied to the field winding 8 and includes a flywheel diode 64 connected in parallel with the field winding 8 .
  • the regulator 6 includes a power generation control section 61 for controlling ON and OFF of the switching transistor 63 based on the control signal transmitted from the electronic control unit 5 .
  • This control signal is inputted via an interface circuit (I/F) section 66 .
  • the power generation control section 61 controls to turn on and off the switching transistor 63 based on the control signal (target voltage Vref or a duty control value of the field current) inputted from the electronic control unit 5 so that a power generation state of the power generator device 1 follows the control signal received from the electronic control unit 5 .
  • the electronic control unit 5 calculates the target voltage Vref or the duty control value of the field current of the power generator device 1 and transmits the same to the power generation control section 61 of the regulator 6 via the I/F section 66 .
  • the electronic control unit 5 changes the control signal transmitted to the regulator 6 in accordance with a change of the output current characteristic of the power generator.
  • the regulator 6 includes a generator type identification information storing section 62 for storing generator type identification information for specifying the output current characteristic (type) of the power generator device 1 .
  • This identification information is transmitted to the electronic control unit 5 via the I/F section 66 and the communication line 100 based on request from the electronic control unit 5 , or periodically, or at each start of power supply.
  • the generator type identification information received from the regulator 6 is transmitted to a power generation control mode selecting section 52 of the electronic control unit 5 via an interface circuit (I/F) section 56 .
  • I/F interface circuit
  • the power generation control mode selecting section 52 selects the power generation control mode corresponding to the read generator type identification information from the power generation control mode storing section 53 .
  • the power generation control mode storing section 53 stores power generation control modes of all or predetermined types of power generators which can be provided in a vehicle mounted with the electronic control unit 5 in pair with the generator type identification information.
  • the power generation control mode selecting section 52 selects the power generation control mode in pair with the generator type identification information corresponding to the read generator type identification information.
  • the selected power generation control mode is transmitted to the power generation control signal outputting section 54 .
  • the power generation control signal outputting section 54 calculates the power generation amount control value (target voltage Vref of power generator device 1 or duty control value of the field current or the like) based on the selected power generation control mode and transmits a result of the calculation to the regulator 6 .
  • the generator type identification information is transmitted from the regulator 6 to the electronic control unit 5 of the vehicle as information with regard to the output current characteristic of the power generator device 1 , based on the received generator type identification information.
  • the electronic control unit 5 can change control constants and transmit the power generation amount control signal optimum for the output current characteristic of the power generator device 1 to the regulator 6 .
  • a single electronic control unit 5 mounted in a vehicle can optimally control many types of power generators having various output current characteristics different from each other.
  • the generator type identification information storing section 62 is constructed by a microcomputer including a non-volatile electrically rewritable memory (EEPROM). Further, the generator type identification information storing section 62 may be constructed with a circuit or a memory capable of transmitting type identification information of the power generator device 1 to the electronic control unit 5 via the communication line 100 .
  • a non-rewritable memory PROM or ROM may be used in place of the non-volatile electrically rewritable memory (EEPROM).
  • the generator type identification information may be stored by cutting 4 pieces of lead terminals coming out from a resin package of IC, or penetrating or cutting a conductive pattern of a printed circuit board by a punching press.
  • the generator type identification information may be written in the EEPROM of the generator type identification information storing section 62 from a write terminal, not illustrated, of the regulator 6 . Further, although it is preferable to write the generator type identification information before mounting the regulator 6 on the power generator device 1 , the generator type identification information can be written after the mounting operation. In place of a memory, the generator type identification information may be written to a printed circuit board by changing a printed wiring pattern. The generator type identification information can be transmitted to the electronic control unit 5 by time sharing along with other communication.
  • a control can be carried out so that the regulator 6 monitors generated voltage VB, compares the generated voltage VB with the target voltage Vref transmitted from the electronic control unit 5 and controls the generated voltage VB to the target voltage Vref.
  • the regulator 6 includes a power generation state detecting section 65 .
  • the power generation state detecting section 65 detects ON-duty of the switching device 63 for switching the field current of the field winding 8 and transmits ON-duty to the electronic control unit 5 via the communication line 100 .
  • the electronic control unit 5 is designed to control the engine (E/G), which drives the power generator device 1 .
  • the electronic control unit 5 calculates load torque of the power generator device 1 based on the signal and carries out engine feedback control. That is, the field current can be calculated from ON-duty of the switching device 63 and the load torque of the power generator can be predicted from the rotational speed of the alternator in proportion to the engine rotational speed and the field current. Therefore, the electronic control unit 5 can calculate the load torque.
  • the torque—rotational speed characteristics of two types of alternators different from each other are shown in FIG. 3 .
  • the electronic control unit 5 can transmit an engine feedback control signal in accordance with the torque characteristic of the power generator device 1 to the engine 10 by switching control constants based on the information. That is, the power generator device 1 controls the engine 10 to generate engine torque in accordance with the load torque of the power generator device 1 calculated based on received ON-duty.
  • the regulator 6 stores the generator type identification information for specifying the torque characteristic (type) of the power generator at the generator type identification information storing section 62 .
  • the generator type identification information is transmitted to the electronic control unit 5 via the I/F section 66 and the communication line 100 .
  • the electronic control unit 5 reads the signal at the I/F section 56 and transmits the signal to the control mode selecting section 52 .
  • the control mode selecting section 52 selects an engine feedback control mode (constant or map data necessary for calculation which differs for respective power generators in power generator torque calculating routine) corresponding to the inputted generator type identification information from the control mode storing section 53 . It outputs the engine feedback control mode to an engine control signal outputting section 55 . Therefore, the control mode storing section 53 stores the necessary number of pairs of the generator type identification information and the engine feedback control modes.
  • the engine control signal outputting section 55 calculates a control signal of the engine 10 based on the selected engine feedback control mode and controls the engine 10 based on the control signal.
  • the generator type identification information as information with regard to the characteristic of the power generator device 1 is transmitted from the regulator 6 to the electronic control unit 5 .
  • the electronic control unit 5 changes the control constants based on the generator type identification information.
  • the engine characteristic of which is influenced by the type of the power generator device 1 is also controlled in correspondence with the characteristic of the power generator device 1 .
  • the power generation state detecting section 65 can be constructed with a circuit for converting input voltage into a pulse signal by a comparator or a binarizing circuit. Although the pulse signal outputted by the power generation state detecting section 65 can directly be outputted to the electronic control unit 5 , the pulse signal may be transmitted after being converted into a digital signal.
  • the generator type identification information outputted by the generator type identification information storing section 62 and the pulse signal outputted by the power generation state detecting section 65 can be multiplexed by a single communication line and outputted, or can be outputted by separate communication lines.
  • the pulse signal (including 0% level and 100% level) indicating the ON-duty may be directly transmitted, until elapse of a predetermined time period from when an ignition switch is turned on, transmission from the power generation state detecting section 65 is cut off and the time period is made to constitute an generator identification transmission time period and a mode of transmitting the generator type identification information may be interrupted.
  • both of the controls can be carried out integratedly.
  • the generator type identification information can be shared by the two controls.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
US09/948,581 2000-09-28 2001-09-10 Automatic vehicle-mounted device control system Expired - Lifetime US6548990B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2000296345A JP4325100B2 (ja) 2000-09-28 2000-09-28 車載機器制御装置
JP2000-296345 2000-09-28
JP2000-357684 2000-11-24
JP2000357684A JP4140191B2 (ja) 2000-11-24 2000-11-24 車両用発電制御装置

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US20020057074A1 (en) * 2000-11-10 2002-05-16 Denso Corporation Method for controlling a vehicular generator, an external controller and a vehicular power generation controlling device
US20030042875A1 (en) * 2001-08-30 2003-03-06 Denso Corporation A.C. generator control apparatus and method having abnormality information output function
US20060214644A1 (en) * 2005-03-23 2006-09-28 Denso Corporation Power generation controller
US20070115866A1 (en) * 2005-10-18 2007-05-24 Denso Corporation Power generation control device for vehicle generator
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JP4103608B2 (ja) 2003-01-29 2008-06-18 株式会社デンソー 車両用発電機のトルク演算装置
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FR2961967B1 (fr) * 2010-06-24 2012-07-20 Continental Automotive France Procede de gestion de la tension d'alimentation d'un calculateur electronique de vehicule automobile
CN105281626B (zh) * 2014-06-19 2017-11-21 固也泰电子工业有限公司 发电机的励磁辅助装置及励磁辅助电源控制方法
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US20020036485A1 (en) 2002-03-28
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EP1193825B1 (de) 2004-10-20
DE60106544D1 (de) 2004-11-25

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